Dark Fantasy was a literary fantasy and horror fanzine by Howard Eugene (Gene) Day (1951-1982).

Gene Day began publishing Dark Fantasy in 1973 in Gananoque, Ontario, Canada. A total of 22 issues were published, the last issue in 1980. Day was told by the printer that issues 12 and 13 were lost, but issue 12 was later reconstructed and printed after issue 19 had come out in 1979. Gene Day suddenly died, at age 31, before issue 13 could be reconstructed. Gordon Derevanchik published a special commemorative double issue of Dark Fantasy, #24/25, in August 1984 in tribute to Gene Day.